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/*
* Copyright 2011 The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef VideoLayerManager_h
#define VideoLayerManager_h
#include "GLUtils.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
#if USE(ACCELERATED_COMPOSITING)
namespace WebCore {
// Every video layer can use its uniqueId to query VideoLayerManager about such
// info globally.
struct VideoLayerInfo {
GLuint textureId; // GL texture bound with the surface texture.
int videoSize; // The size of the video.
int timeStamp; // Used to decide which VideoLayerInfo is the oldest one.
GLfloat surfaceMatrix[16];
};
class VideoLayerManager {
public:
typedef HashMap<int, VideoLayerInfo*>::const_iterator InfoIterator;
VideoLayerManager();
// Register the texture when we got setSurfaceTexture call.
void registerTexture(const int layerId, const GLuint textureId);
// Update the size when the video is prepared.
void updateVideoLayerSize(const int layerId, const int size);
// At draw time, update the matrix for every video frame update.
void updateMatrix(const int layerId, const GLfloat* matrix);
// Remove the layer info from the mapping.
void removeLayer(const int layerId);
// Return the texture name corresponding to the layerId
GLuint getTextureId(const int layerId);
// Return the matrix for surface texture corresponding to the layerId
GLfloat* getMatrix(const int layerId);
// Delete the GL textures
void deleteUnusedTextures();
private:
// Get the sum of all the video size stored in m_videoLayerInfoMap.
int getTotalMemUsage();
// If the memory consumption is out of bound, recycle some textures.
bool recycleTextureMem();
// The private function to remove layer.
void removeLayerInternal(const int layerId);
// Indexed by each layer's uniqueId, this map contains the important info
// used for showing the video when playing or the screenshot when paused.
HashMap<int, VideoLayerInfo*> m_videoLayerInfoMap;
android::Mutex m_videoLayerInfoMapLock;
// Everytime we add one item to the map, we update the timestamp.
int m_currentTimeStamp;
// The retiredTextures is used to communicate between UI thread and webcore
// thread. Basically, GL textures are determined to retire in the webcore
// thread, and really get deleted in the UI thread.
Vector<GLuint> m_retiredTextures;
android::Mutex m_retiredTexturesLock;
};
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
//
#endif // VideoLayerManager_h
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